What could a hard bony lump on my left collarbone be that causes trouble breathing at night?

Answer:

This could be a bone spur or a calcium deposit. These are nothing to worry about unless it is causing problems with everyday living. Since this is obstructing your breathing when you lay a certain way at night, I consider this to be a serious issue. Please see your personal physician as soon as possible for diagnosis and treatment. Without an X-Ray or other radiography, it will be impossible for anyone to diagnose on WikiAnswers. See your personal doctor.

First answer by Gh2374h25ghdt3. Last edit by Gh2374h25ghdt3. Contributor trust: 53 [recommend contributor recommended]. Question popularity: 2 [recommend question].